Magnetic system installation structure and circuit breaker

Abstract

The present invention provides a magnetic system mounting structure and circuit breaker, belonging to the field of low-voltage electrical apparatus technology. The structure includes a slot located on a housing, and an adjacent assembly block is provided on the outer side of the slot adjacent to the tripping system. The outer side of the assembly block is an inclined surface, and the height of the assembly block is less than the height of the side wall of the slot. The present invention utilizes an assembly structure for indicating when the magnetic system is not properly installed. Through this assembly structure's prompt, operators can detect any improper magnetic system installation as early as possible before product testing, thereby improving product qualification rates and production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical appliances, and in particular to an installation structure for a magnetic system and a circuit breaker thereof. Background Art

[0002] The magnetic trip system is a core component of low-voltage electrical equipment such as circuit breakers and relays. It generally consists of a magnetic system and a tripping system. The magnetic system includes a bobbin and coil. Due to the advancement of industrial automation, circuit breakers and relays are now mostly manufactured using automated assembly lines. Currently, the coil and bobbin are manufactured separately and then plugged into the housing during product assembly. Furthermore, with the advancements in circuit breaker and relay product development, there's a trend toward eliminating the mounting bracket for the magnetic trip system. A viable alternative is to design a slot in the product housing. One side of the slot is formed by the housing's sidewall or a flange located near the sidewall. The other side, near the tripping system, features a slot formed by two clearance-fit flanges. Given the structure and manufacturing process of the magnetic trip system, during the pilot production phase, due to the assembly line process, the bobbin can easily pop out of its slot during assembly, and this situation is difficult to detect. This improper assembly is only discovered during later product testing or when the handle is re-engaged, severely impacting production efficiency. This problem can go undetected and potentially lead to safety incidents.

[0003] Based on this, this application is filed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides an installation structure of a magnetic system and a circuit breaker thereof, which solves the problem of improper assembly of the magnetic system in the prior art and improves product qualification rate and production efficiency.

[0005] To achieve the above-mentioned purpose, the installation structure of the magnetic system of the present invention is as follows: it includes a slot located on the shell, and an assembly block adjacent to the outer side of the slot adjacent to the tripping system is provided, the outer side surface of the assembly block is an inclined surface, and the height of the assembly block is less than the height of the side wall of the outer side of the slot.

[0006] Alternatively, a notch adapted to the stopper on the frame of the magnetic system is provided on a side of the slot opposite to the tripping system, and the assembly rib is located outside the notch and adjacent to the notch.

[0007] The present invention further provides the following features: an inner bevel is provided between the upper surface and the inner surface of the assembly stop, and the inner bevel is positioned adjacent to the retaining groove. The inner bevel reduces the area of the assembly stop's upper surface, thereby reducing its support for the frame into which it is inserted, and cooperates with the outer bevel to guide the assembly stop toward the release system, causing the push rod in the magnetic system to contact the release system, thereby enhancing the effectiveness of the assembly stop of the present invention.

[0008] The present invention is further configured as follows: the outer inclined surface of the assembly block has an inclination angle of 60-80 degrees, so as to quickly and effectively guide the skeleton jumping out of the notch to the tripping system side, further improving the function of the assembly block.

[0009] The present invention is further configured as follows: the inclination angle of the inner inclined surface of the assembly stopper is 45-60°.

[0010] The present invention is further configured as follows: the inner side surface of the assembly stopper and the outer surface of the slot and the side opposite to the slot and the release system are in the same plane. On the one hand, the slot and the assembly stopper can be seamlessly connected to prevent the skeleton from being stuck between the assembly stopper and the slot. On the other hand, at the first moment the skeleton jumps out, the assembly stopper can play a role and force the skeleton to slide toward the release system.

[0011] The present invention is further configured as follows: the height of the side of the card slot opposite to the tripping system is not less than 1 / 4 of the height of the frame installed on the housing.

[0012] Through the above structural restrictions, the present invention increases the difficulty of the frame jumping out from the inside of the slot to the outside of the slot during assembly, thereby reducing the probability of jumping out, thereby improving the effectiveness of product assembly.

[0013] The present invention is further configured as follows: the recess on the side of the card slot opposite to the tripping system has an avoidance structure adapted to the push rod of the magnetic system, and the avoidance structure is an arc-shaped slot provided on the upper edges of both sides of the recess.

[0014] The above structure can avoid the adverse effects of the magnetic system installation structure on the normal operation of the magnetic system on one hand, and on the other hand, it also increases the difficulty of the frame jumping out from the inside of the slot to the outside of the slot during assembly, thereby reducing the probability of jumping out and improving the effectiveness of product assembly.

[0015] Another object of the present invention is to provide a circuit breaker, comprising a housing, a tripping system, and a magnetic system, wherein the magnetic system comprises a frame, a coil, and a push rod, and the housing is provided with a mounting structure for the magnetic system as described above, wherein the mounting structure of the magnetic system cooperates with a side of the housing or a rib protruding from the housing to form a slot, and the magnetic system is installed in the slot.

[0016] The beneficial effects of the present invention are as follows:

[0017] First, the present invention provides a stopper with an outer bevel on the outside of the latch slot and the trip system. During assembly, the frame is forced to deflect toward the trip system. When closing the circuit breaker, the frame interferes with the trip system's latch, causing the product to trip and prevent closing. This allows for early detection of frame misassembly, improving product quality and efficiency.

[0018] Second, the present invention also increases the difficulty of the frame jumping out of the slot during assembly on the assembly line by increasing the height of the slot, thereby reducing the probability of improper assembly of the frame and improving the product qualification rate.

[0019] 3. The present invention can reduce the probability of improper assembly of the skeleton in the prior art by 83% by only making partial structural changes to the installation structure for installing the magnetic system on the shell, effectively improving the qualified rate of product production, thereby reducing the number of product reworks and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the specific embodiment 1 of the present invention.

[0021] Figure 2 It is a three-dimensional schematic diagram of specific embodiment 1 of the present invention.

[0022] Figure 3 It is a top view schematic diagram of specific embodiment 1 of the present invention.

[0023] Figure 4 for Figure 3 Schematic diagram of the cross section in direction A.

[0024] Figure 5 for Figure 3 Enlarged schematic diagram of point A.

[0025] Figure 6 for Figure 4 Enlarged schematic diagram at point B.

[0026] Figure 7 This is a schematic diagram of the assembled state of a specific embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of a state where an embodiment of the present invention is not fully assembled.

[0028] Figure numerals: 1—magnetic system, 2—push rod, 3—skeleton, 4—tripping system, 5—housing, 101—rib 1, 102—assembly block, 103—arc-shaped slot, 104—rib 2, 105—recess, 106—inner rib, 101a—outer side surface of rib 1, 102a—outer bevel, 102b—inner bevel, 102c—inner side surface of assembly block. DETAILED DESCRIPTION

[0029] The present invention provides an installation structure for a magnetic system 1 and a circuit breaker using the installation structure of the magnetic system 1. The overall installation structure of the magnetic system 1 is a slot provided on a housing 5, which is installed adjacent to a tripping system 4. The side of the slot facing away from the tripping system 4 is a side wall or a baffle of the housing 5. The side of the slot close to the tripping system 4 is a baffle structure. Adjacent to the baffle structure, an assembly structure is also designed to prompt that the magnetic system 1 is not properly installed. Through the prompt of the assembly structure, the operator can discover the situation where the magnetic system 1 is not properly installed as early as possible before product testing, thereby improving product qualification rate and production efficiency.

[0030] Example 1 Figure 2 、 Figure 3 As shown, this embodiment provides an installation structure of a magnetic system 1, including a rectangular slot provided on the shell 5, the rectangular slot being adjacent to the area on the shell 5 for installing the trip system 4, and the side of the rectangular slot facing away from the trip system 4 is a rear baffle protruding from the surface of the shell 5 and having an arc-shaped groove, and the side of the rectangular slot close to the trip system 4 is a front baffle protruding from the surface of the shell 5.

[0031] See also Figure 2 As shown, in this embodiment, the front baffle includes a first rib 101 and a second rib 104 located on the same straight line and spaced apart, with the spacing being a notch 105. The heights of the first rib 101 and the second rib 104 can be slightly lower than the height of the rear baffle. In one embodiment, the heights of the first rib 101 and the second rib 104 are no less than 1 / 4 of the height of the frame 3 mounted on the shell 5, to ensure that the first rib 101 and the second rib 104 have a certain blocking effect on the frame 3, preventing it from crossing the first rib 101 and the second rib 104 and jumping out of the notch. The upper edges of the first rib 101, the second rib 104, and the notch 105 are jointly provided with an arc-shaped slot 103. The diameter of the virtual circle in which the arc-shaped slot 103 is located is larger than the diameter of the push rod 2 of the magnetic system 1, thereby ensuring that the magnetic system 1 can function normally. In this embodiment, the notch 105 between the first rib 101 and the second rib 104 is provided to increase the installation stability of the frame 3. To this end, the frame 3 is provided with a clamping block 301 at its corresponding position to cooperate with the notch 105.

[0032] An adjacent assembly block 102 is located outside the gap between side 101 and side 2, 104, with the slots as the inner space. The outer side of assembly block 102 is a sloped surface (hereinafter referred to as outer slope 102a), and its height is less than the height of the sidewalls of side 101 and side 2, 104. By providing assembly block 102 with an outer slope, when the frame 3 is assembled and released from the slot, it is guided by outer slope 102a and moves toward the trip system 4. Because the magnetic system 1 and the trip system 4 are spaced apart in the circuit breaker's magnetic trip system 4, and the gap between them is relatively fixed, once the frame 3 enters the gap, the frame 3 or the push rod 2 of the magnetic system 1 contacts the latch, causing the product to remain in the tripped state and unable to close. Furthermore, during assembly of the trip system 4 or after the handle and trip system 4 are assembled, it is very easy to detect when the handle is turned if the product fails to close. This allows for quick and early detection of improper assembly of the frame 3, improving processing efficiency, reducing rework steps, and shortening rework time. Therefore, to ensure smooth sliding of the frame 3 on the outer bevel 102a, the outer bevel 102a preferably has an angle of 60 to 80°.

[0033] Of course, in order to improve the guiding effect of the assembly block 102 of this embodiment, as shown in FIG. Figure 6 As shown, an inner bevel 102b is provided between the upper surface and the inner surface of the assembly block 102, and the angle of the inner bevel 102b of the block is between 45 and 60 degrees. The inner bevel 102b can reduce the area of the upper surface of the assembly block 102, thereby making it unable to support the frame 3, allowing the frame 3 to slide along the outer bevel toward the trip system 4.

[0034] And, combined Figure 6 It can be seen that the inner side surface 102 c of the assembly stopper 102 and the outer side surface 101 a of the first rib 101 and the outer side surface of the second rib 104 are in the same plane, thereby improving the effectiveness of the assembly stopper 102 structure.

[0035] Example 2 The difference between this example and Example 1 is that, in this example, the recess 105 may not be provided between the side guard 101 and the side guard 2 104. Although this structure reduces the stability of the side of the skeleton 3 adjacent to the tripping system 4 installed in the slot, it can simplify the structure and make the product more suitable for production.

[0036] Example 3 This example differs from Example 1 in that Figure 3As shown, the inner side of the front baffle, that is, the inner side of baffle 101 and baffle 2 104, is also provided with an inner baffle 106 spaced apart and parallel thereto. The inner baffle 106 is clearance-matched with the front baffle to form a small slot for clamping one side of the frame 3, thereby ensuring that the frame 3 is stably fixed in the mounting structure without the aid of other connecting parts such as screws, so as to facilitate assembly and transportation of automated production.

[0037] Example 4 This example provides a circuit breaker, comprising a shell 5, a tripping system 4 and a magnetic system 1, wherein the magnetic system 1 comprises a skeleton 3, a coil and a push rod 2, and the shell 5 is provided with a mounting structure of the magnetic system 1 as described in any one of Examples 1-3, and the mounting structure of the magnetic system 1 cooperates with one side of the shell 5 or a rib protruding from the shell 5 to form a slot, and the magnetic system 1 is installed in the slot.

[0038] In summary, the present invention provides an installation structure of a magnetic system 1 with a simple structure and convenient automated assembly. Through a clever and miniaturized structural design, it increases the difficulty of the skeleton 3 jumping out of the slot and provides a reminder that the skeleton 3 is not properly assembled. It helps the operator or assembly robot to discover the assembly problem as early as possible during the assembly line and automated processing, thereby preventing the problem from occurring after the product is fully assembled, greatly reducing the occurrence of the coil skeleton 3 not being properly assembled, and also improving the product qualification rate.

Claims

1. A mounting structure for a magnetic system, comprising a slot on a housing, the slot being adjacent to a tripping system, characterized in that: An assembly block adjacent to the card slot is provided on the outer side of the side adjacent to the tripping system, the outer side surface of the assembly block is an inclined surface, and the height of the assembly block is less than the height of the side wall of the outer side of the card slot; the outer surface of the side adjacent to the tripping system and the inner side surface of the assembly block are in the same plane, and the upper edge of the side adjacent to the tripping system together form a virtual circle; a recess is provided on the side adjacent to the tripping system that is adapted to the block on the skeleton of the magnetic system, and the assembly block is located on the outer side of the recess and adjacent to the recess.

2. The mounting structure of the magnetic system according to claim 1, wherein: An inner inclined surface adjacent to the clamping groove is provided between the upper surface of the assembly stopper and the inner surface thereof.

3. The mounting structure of the magnetic system according to claim 2, wherein: The inclination angle of the inner inclined surface of the assembly stopper is 45-60 degrees.

4. The mounting structure of the magnetic system according to claim 1, wherein: The inclination angle of the outer inclined surface of the assembly stopper is 60-80°.

5. The mounting structure of the magnetic system according to claim 1, wherein: The height of one side of the card slot adjacent to the tripping system is not less than 1 / 4 of the height of the frame installed on the shell.

6. The mounting structure of the magnetic system according to claim 1, wherein: The notch on the side of the card slot adjacent to the tripping system has an avoidance structure adapted to the push rod of the magnetic system, and the avoidance structure is an arc-shaped slot provided on the upper edges of both sides of the notch.

7. A circuit breaker comprising a housing, a tripping system, and a magnetic system, the magnetic system comprising a frame, a coil, and a push rod, the housing being provided with a mounting structure for the magnetic system according to any one of claims 1 to 6, the mounting structure for the magnetic system cooperating with a side of the housing or a rib protruding from the housing to form a slot, the magnetic system being mounted in the slot.

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